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Question 20269
JEE Physics · Medium

Semiconductors: EXNOR Gate MCQ

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EXNOR GateMediumQuestion 20269

Question

XNOR (Exclusive NOR) gate output is 1 when:
  1. A
    Inputs are different
  2. B
    Both inputs are 1 only
  3. C
    Both inputs are 0 only
  4. D
    Both inputs are equal (same)
    Correct

Correct answer

Both inputs are equal (same)

Explanation

XNOR: Y = (A⊕B)̄ = Ā·B̄ + A·B. Truth table: 00→1, 01→0, 10→0, 11→1. Output HIGH when both inputs are same. Used as equality detector in comparators.

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